Among the general works on the late empire that treat Diocletian extensively are A.H.M. Jones, The Later Roman Empire, 284–602 (1964, reprinted 1986); and Pat Southern, The Roman Empire from Severus to Constantine (2001). Works that present documentary evidence include Simon Corcoran, The Empire of the Tetrarchs (1996); and Roger Rees, Diocletian and the Tetrarchy (2004). More specific treatments of Diocletian are Timothy D. Barnes, The New Empire of Diocletian and Constantine (1982); and Stephen Williams, Diocletian and the Roman Recovery (1985, reprinted 1997).